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Fig. 1 | Emerging Themes in Epidemiology

Fig. 1

From: Randomised and non-randomised studies to estimate the effect of community-level public health interventions: definitions and methodological considerations

Fig. 1

Trend interpretation in non-randomised cluster trails (NCT) and before-and-after trails with control group (CBA): a good balance, no trend in control arm; b good balance, strong trend in control arm; c poor balance, no trend in control arm; d poor balance, strong trend in control arm; e poor balance, erratic trends; f poor balance, opposing trends

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